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simple_ondemand governor support for DDR devfreq

Sebastian Krzyszkowiak requested to merge sebastian.krzyszkowiak/linux-next:ondemand into pureos/byzantium

Those are just rebased patches by Leonard Crestez that @martin.kepplinger pointed me once to with a small fix to make them actually work. I'm running them on my phones for a long time now. Just putting it out there for visibility.

To make use of it, you need to switch the governor to simple_ondemand, for instance by putting this into /etc/udev/rules.d/86-librem5-devfreq.rules:

ACTION=="add", SUBSYSTEM=="devfreq", TEST=="governor", ATTR{governor}="simple_ondemand"

Related: #188 (closed)

Edited by Sebastian Krzyszkowiak

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